Combined typewriting and computing machine



Sept 13, 1932- A. G. F. KuRowsKl 1,876,696

COMBINED TYPEWRITING AND COMPUTING MACHINE 8 Sheets-Sheet l Filed March12, 1926 Sept. 13, 1932. A. G. F. KuRowsKl COMBINED TYPEWRITING ANDCOMPUTING MACHINE Filed March l2. 1926 8 Sheets-Sheet 2 INVENTOR:

Sept 143, 1932. A. G. F. KuRowsKl COMBINED TY-PEWRITING AND COMPUTINGMACHINE Filed Marh l2, 1926 8 Sheets-Sheet 5 INVENTOR! Sept. 13, v1932.A. G. F. KuRowsKl COMBINED TYPEWRITING AND COMPUTING MACHINE Filed March12, 1926 8 Sheets-Sheet 4 R 0 T N E V N ATT NEY.

Sept. 13, 1932. A. G. F. KuRowsKl 1,876,696

COMBINED TYPEWRITINC AND COMPUTING MACHINE Filed March 12, 192e '8sheets-Sheet 5 FIG. IO.

INVENTOR 5) ATTOR Sept 13, 1932- A. cs. F. KURowsKl 1,876,696

COMBINED TYPEWRITING AND COMPUTING MACHINE Filed March 12, 1926 8Sheets-Sheet 6 INVENTOR? Z55 l wmw By N Sept. 13, 1932.' A G, F,KUROWSK] 1,876,696

COMBINED TYPEWRITING AND COMPUTING`MACHINE Filed March l2, 1926 8Sheets-Sheet 7 Sept. 13, 1932. A. G. F. KuRowsKl i 1,876,696

COMBINED TYPWRITING AND COMPUTING NACHINE Filed March 12, 192e 8sheets-sheet a NE E s. oww:

Patented Sept. 13, 1932 UNITED STATES PATENT OFFICE ALFRED G. F.KUROWSK, F BROOKLYN, NEW YORK, ASSIGNOR, BY `'.MESIWE ASSIGN- MENTS, T0ELLIOTT-FISHER COMPANY,

DELAWARE Oll'sv NEW YORK, N; Y., A CORPORATION OF COMBINED TYPEWRITINGAND COMPUTING MACHINE application mea umh 12, 192s. seriai 1ro. 94,181.

This invention relates to combined type-` writing and computmgmechamsms, and more 893,718 and 893,719, dated July 21', 1908.

Inv the patent to Wahl No. 893,719 `the master gear'is first conditionedfor an additive or subtractive state by a manually operable.vvk

gear-shifting mechanism to control the rotary direc-tion of themaster-gear,and the computing state of the gear-shifting means isindicated at all timesby a visual readin of suitably-inscribed indexinginterlocks.

er is in a. computing zone first actuates means t-o lock thedenominational position of the totalizer to the stationaryactuator-frame, to prevent independent carriage-feeding movement thereofuntil a full computin stroke of thekey has been accomplished,v ansimultaneously lwith the ldcking of the totalizer, to effect aside-shiftof the key-actuated driving sector into operative engagement to drive amaster-gear. A :tur/ther depression of the numeral-key actuatesdifferential driving means that-predetermine the degree of rotation ofthe driving sector and the sectordriven masterear, which will beroportional to the igitalvalue ,of the ey depressed. When rotarymovement is conveyed to the driving sector to rotate the mastergear, afull-stroke locking pawl brushes over the peripheral ratchet teeth of awin -sector rotated by the key to interlock. with the lpawl and preventa restoration of the key should the finger leave the key in asemi-depressed position, and provides that the stroke ol' the key mustbe completed to correctly type and register a number on thedownhekdepression of a numeral-key while the totalizstroke of the key. Shouldthe numeral-key be wrongly depressed and the operator detect' themistake before .the tull'doWn-stroke is completed, Wahl makes provisionfor a key-actuated means to engage with and lift the'full-stroke lockingpaWl out of engagement with the 'co-operating teeth of the keyactuatedwing, and a spring restores the semidepressed key and its co-actingparts tenormal position. Wahl also shows a master-dog which, by a singlevibratory movement, locks the totalizer-truck and releases thecarry-over mechanism of the next. lower denominational order andco-operates with means on the frame-to prevent the actuation of thenumeral-key when the totalizer is spaced at a decmal or otherpunctuation position between denommatipnal groups of figures requiring apunctuatlon-typing or a space-bar operation 'to step the totalizer tothe next lower denomr inational position.

In the Wahl Patent No. 893,718 a totalizer is shown. slidably mountedupon a truck carried at the front of the carriage, and said totalizeris' provided with a locking lever pivoted' at one side thereof to lockthe totalizer to the truck at any letter-space position by interlockingwith rack-teeth on the truck spaced letter-space distances apart. Thetotalizer further includes a series of registerwheels individuallydriven by carrying gears that engage with a master-gear seriatim fromhighest to lowest denominational order through the step-by-stepmovementof the carriage. Each carrying gear is provided with carry-overmechanism mounted 4upon supporting arms which are individuallyspring-pressed to maintain toothed engagement with the carrying gears,and, to condense the assembly of the carry-over members, alternatesupporting arms are mounted to vibrate in staggered relation upon twoparallel shafts, and, as shown in the Patent No. 893,719, eachcarry-over arm terminates ata linger below the sbaftsto be actuated bythe master-dog for the purpose of raising the carry-over members, aspreviously describedto free the active carrying gear from itsstar-wheel-interlock with the next gear of lower denominational order.The carry-over ICE supporting arms are provided with adjustingstop-screws at their free ends to maintain a. toothed transmission ofmovement between the carrying gears and the carry-over pinions withoutundue backlash.

One feature of the present invention provides for a positivetransmission of movement from the key-actuated'cam to thedifferentially-operated driving gearsector, either downwardly orreversely, without any loss of motion, and the reversal of the carryovermembers will be accurately accomplished without requiringa subsequentcomputing operation to correct the reading of the totalizer. The usualspring-tension for restoring al key and its co-acting parts may not besuiiicient to restore a succession of carry-over members, and if theactuation of the error or elimination lever fails4 to instantly restorethe parts, due to insuicient springtension, the depressed numeral-keymay be raised by the linger, and through the closeitting,positively-connected intermediate parts, a plurality of reversecarry-over'operations can be eifected'to fully restore the to-ltalizer-wheels to their prior readin This feature is an important factorin a combined machine that types and computes, as heretofore it has beenthe practice to finish the stroke of the keywithout typing, and thenrestore the registerto its formerstate by asubtractive operation, whichmust be carefully executed and without typing on the work-sheet.

Another object of this invention provides tooth-aligning means thatengage directly with the teeth of the carrying gears, and includetoothed arms arrangedto engage the carrying gears of highest and lowestorder with a third arm operative upon an intermediate carrying gear thusproviding a plurality of corrective tooth-interlocking arms distributedalong the long row of carrying gears, to remove any spiraling from thedigit wheels, as a series, after eachY carry-over operation and aftereach master-gear engagement. l

Another feature provides that when the case-shiftrkey is depressed,connections are automatically established to simultaneously silence themaster-gear, and when it is required that the or :h5 characters, or anyother non-numeral characters, be typed within a computing zone coveredby the totalizer, the non-numeral character may be typed withoutactuating the master-gear, and upon release of the shift-key, thetotalizer-actuating mechanism is automatically restored. In this mannerit is made possible to prefix the typed numeral with the $-characterwithin a computing zone by the usual manipulation of the case-shift key,and the operator is relieved of all responsibility for correctly typingthe numeral and simultaneously clearing the register by a subtractiveoperation, except to-arrest the carriage by a denominational tabulation,one denominational unit higher than the highest di it to be entered intothe register, tov provide or a letter-space position for the$-character.

Another feature includes a safety-keylocking means to prevent a jointoperation of two computing actuator-devices by applying the safetinterlocking members under the.V

numeraley-levers adjacent the position of their keys, and thus arrest astruck key at the seat-of the impact before it has transmitted motion toa totalizer-actuator part.

The safety locking means include a series of floatingvertically-disposed members having a serial endwise contact betweenfixed stops at each end with suicient looseness, as a series, to permitthe passage of a single keylever ltherebetween and check the passage ofthe second key-lever until the first keylever has been withdrawn.

The .Underwood typewriting machine proclude a case-shift mechanism, aback-spacing mechanism, a denominational tabulating mechanism and apower-driven carriage-return and automatic line-spacing mechanism.

These mechanisms are all key-actuated, and.

that enters into the computation. Similar-` ly, the back-space key islocked, making it impossible to change the denominational letter-spaceposition to which the totalizer is set to a higher denominationalposition, and the locking of the tabulator-keys prevents the totalizerbeing shifted to lower de-I nominational positions, and the accidentaldepression of the carriage-return key during a computing depression of anumeralkey might result in serious injury, or even in fracturing some ofthe operating parts. Locking these several parts by the initialactuation of any numeral-key to compute, renders all the carriae-controllin mechanisms proof against acci ental operation or misuse.

In well-known adding and listing machines, provision hasbeen made for anonprint key, to cutk out the type-listing elements when the nature ofthe workrequires' that only the totals of each series of computations betype listed. This enables the operator to run numeral items into theregister for a grand total, which grand total of each series may laterbe type listed upon the work-sheet upon the release of, the nonprint keyand the simultaneous depression 130 vvides carriage-controlling devicesthat in-v los llfl

without a computation,y other items may` be type-listed upon awork-sheet with a totalizer computation, or items may be indie viduallyentered into the totalizer without type-listing on the work-sheet. Thislatter lfeature includes a non-print key, which upon being depressed,does not actuate a complicated mechanism to temporarily severconnections between the typing and computing elements, but operatestothrow an obstructive member into the path of the typebars just inadvance of t e printing position, to prevent typing upon a work-sheet,This simple method, to prevent the typeklisting of items simultaneous totheir registry into a totalizer, 4enables the combined e typewriting andcomputing machine to be employed in non-listing computations for a grandtotal, which grand total may, upon the release of the non-print .key andthe setting of the actuator mechanism to a subtractive state, be typedupon a 'work-sheet and the totalizer cleared. This gives to the combinedtypewriting and computing machine herein-disclosed a greater field ofusefulness by broadening its operative scope as applied to modern oiceaccounting practice.

Other features and advantages will hereinafter appear.

ln the accompanying drawings,

Figure 1 is a Vertical section looking from the left-hand side of anvUnderwood standard typewriting machine, showing a totalizer adjusted atthe front of the' carriage, an' actuator at the front of themachine-frame over the keyboard, and' the several associatedtypewriter-parts operatively connected thereto, with many of thetypewriter-parts l omitted for clearness in this view, but which will beshown in another view.y Figure 2 is an enlarged cross-section throughthe. totalizer-truck, showing the manner of suspending and guiding thetruck upon antifri'ctional bearings carried by a rail at the upper sideof the actuator-frame.

Figure 3 is a vertical section similar to Figure 1, but showing thepower-driven carriagereturn mechanism, case-shifting mechanism,tabulator-mechanism, and the .key-locking meansunder the keyboardvariously actuated by these mechanisms.

Figure 4 'is a view, showing one of the actuator-cams semi-depressed byits key with the error or elimination key depressed to permit therestoration of the cam and its associated parts to normal position.

mechanism including the' master-gear and its co-operative parts thatchange the rotary state-of the master-gear. v K

Figure 6 a front elevation of the parts shown in Figure 5. Y l

Figure 7 is an enlarged rear View of an assembled totalizer detachedfrom a totalizer-truck.

Figure 8 is an enlarged front elevation on a plane through themachine-frame indicated by the line 8-8 of Figure 3, showing in detailthe manner of locking nine numeralkeys when the tenth key is depressedto fill up the gap shown between a series of Heating' members, and alsoshowing other parts cooperative with the carriage-return key to preventthe actuation of any numeral-key by closing up this open key-gap duringthe power-driven carriage-return movement.

Figure) is a skeleton view, showing, how the depression of anytabulator-keyvoperates to lock the numeral-key, and also prevents theactuation of the carriage-return key until the tabulator-key isreleased.

Figure 10 is a top plan view of the extreme right and left hand portionsof the keyboard, showing the mannerof securing the several associatedparts, including rockshafts, to the two side walls of the frame.

Figure 11 is-a skeleton view, illustrating connections from a non-printkey that is operative to swing an obstructive bar to intercept thetype-bars in advance of the printing position, and enable the operatorto render a computation without typing.

Figure 12 isa front view of the extreme right and left hand portions ofFigure 8, showing a tabulator-key depressed and the numeral-keys lockedby thelilling up of the gap between the floating members.

F,igure 18 is a skeleton view, showing the case-shift key depressed, theplaten raised to the upper-case position, and connections t0 theactuator to render the master-gear inoperative during thel typing of anyupper-case character on the numeral-keys, with safety interlocking meansto prevent actuation of a numeral-key until the shift-ke has beendepressed for a full down-stro ce against its fixed stop. v

Figure 14'is a skeleton view, showing the back-s acing key depressedwitl1 interlocking sa ety connections to prevent the actuation of anumeral-key until the back-space keyis restored'to normal position.

circuit to the carriage-driving-motor, and interlocks established torevent the actuation of any numeral-key sh1ft-key or back-space erl keyduring the interval. the carriage-return mechanism is operative.

Figure 16 is an enlarged fragmentary front view with the cover-plateremoved to expose the connections that condition the actuator-mechanismto compute or not to compute upon the actuation of a numeral-key totype.

Figure 17 is an enlarged front view of the master-gear and its severalcontrol-devices and connections that change the'y rotary state of themaster-gear.

Figure 18 is a skeleton view of a depressed numeral-key., and theinterlocking parts moved into positions to intercept the depressionofthe case-shift-key, the back-space key and the tuhulator-keys untilthe numerallrey has been restored to its normal position.

Figure 19 is an enlarged. sectional view of the totalizer on line 19-19of Figure 7, showing one carrying gear therein in operative train withthe master-gear that is also in train with the driving sector that hasbeen partially actuated by the actuating cam connected to a key. |Thisview also shows. the master-dog in operative position to lift thecarry-over member out'of engagement with the carrying gear, and thetotalizer-truck is locked to the actuator-'frame by the masterloclringdog.

Figure 2() is an enlarged end view of the totalizer with the left-handside plate removed to expose the tooth-aligning arm for the carryinggear of highest denomination and the master-dog in normal position.

Figure 21 is a front elevation of the totalizer, shown at Figure 20,with the cover-plate, totalizer-wheels and intermediate gears re movedto expose one set of carry-over members in operative relation withoutalternate carrying gears.

Figure 22 is a View with the carryover members, shown in Figure 21,removed to disclose the other set of carry-over members in operativeengagement with the alternate carrying gears of Figure 21.

Figure 23 is a sideview showing the construction of the aligning arm forthe totalizer carrying wheel of lowest denominational order.

Figure 24 is an enlarged end view of the upper portion of a totalizer,showing its latch-releasing lever as also operating the carry-overlocking bail, after the totalizer is removed from the machine; some ofthe parts being omitted for clearness.

The Underwood standard typewriting machine includes alphabet-keys 25 andnumeralkeys 26 to operate key-'levers 27 extending rearwardly inparallel planes to engage a fulcrum wire 28 under the inuence ofindividual recoil springs 29. `Each key-lever is connected to vibrate abell-crank 30 whose upper end is pivotally connected to a typebar 31hung upon a fulcrum wire 82 to be vibrated upwardly and rearwardlyagainst the front face of a platen 33 mounted within a platen-frame 84carried by a carriage 35 and rotatable step-by-step line-space distancesby the usual line-spacing mechanism 86. The carriage 35 at the rear ismounted upon a carriage-rail 37, and the front side thereof is supportedby a roller 88 which rolls upon a stationary rod 39 carried by theframe. Each type-bar is formed with a heel 40 to engage with a curveduniversal bar 41 forming part of a frame which is pivotally connected atthe rear to an escapement rocker 42 having the usual escapement dogs toengage the teeth of a ratchet-wheel 43, so as to control the movement ofa pinion 44 secured thereto, which is in mesh with a feed-rack 45carried by arms pivotally connected to the platenframe ends. To propelthe carriage 35 leftward, or in a letter-space direction, a spring ldrum 46 may be connected by a tape 47 to a convenient part of thecarriage.

rllhe computing mechanism includes an actuator 49 having a back bar 50and ends 5l secured as a unit to the front of the typewriter framejustover the keyboard, and includes mechanism for driving a mastergear52 to actuate one or more computing heads or totalizers 53 carried bythe typewriter-carriage in a manner hereinafter described.` Themaster-gear 52 is connected to be operated by thenumeral-keys26 throughdistances that vary according to the digital values of the keys. To thisend, each numeral-key-lever 27 is connected by a link 54 to an actuatingcam-device 55 pivotally mounted as a series upon ashaft 56 supported bythe two actuator-frame ends 5l. Each cam-device 55 has a. stop-face 57to normally bear against the face of the back bar 50. Upon thedepression of a numeral-key, the associated actuating cam-device 55 isswung downwardly about the shaft 56 to actuate a rock-shaft 58 throughthe medium of arms 59, which are fixed upon said shaft 58 and are heldin operativeengagement with their cam-devices 55 by a spring 60. Therock-shaft 58 is Vprovided with a series of these arms 59, one arm beingassociated with each cam-device 55, and ,the cam-slots 61 thereinvarying in shape and operative sweep, as indicated at Figure 3, to rockthe shaft 58 differentially through varying angular distances. .Thedifferential movements of the rock-shaft 58 are transferred to'themasterlgear 52 through a train of connections including a pair ofcrank-arms 62 xed upon the rock-shaft 58 parallel to each other,

the free ends thereof being connected by a stud 63 arranged to provide apivotal bearing for a link 64, which is pivotally connected to agear-sector 65 mounted to swing upon a suitable stud 66, said stud beingsecured between two intermediate partition plates 67 which are securedto the back bar 50. and said link 64 may be reinforced by a guide-slot65 formed within a ledge b integral with the sector 65.

The sector 65 normally engages with -a pinion 68, when the machine isset for addition, which is formed integrally with a similar pinion .69through the medium of a sleeve 70. The master-gear 52 is. normallydisconnected from the pinion 69, but, during the initial depression ofany numeral-key, said pinion 69 is operative to drive the master-gear 52through the medium of a clutch 71. The pinion element 70, including thepinions 68 and 69 and the sleeve Y7 0, is revolubly supported on a shaft72 (Figure 17) having bearings in suitable end plates 72a. Said pinionelement is held in position lengthwise of the shaft 72 by means of acollar 73 at one side and a sleeve 74 at the other side thereof. Theclutch element 71 is provided at its right-hand side with a tongue 7 5lengaging in a suitable slot of a rlriving'disk 76 secured to the shaft72. The

master-gear 52 is also permanently s ecured to said shaft 72, and, whenthe pinion 69 is rotated, the clutch element 71, having previously beenconnected therewith through the medium of atongue 77 entering betweenthe teeth of the pinion 69,`is rotated, andthe master-gear 52-'is .alsorotated through the same angular distance, which angular dis-v tancevarles according to the numeral-keyv depressed.

The master-gear 52 is normally locked by a pawl 78 engaging betweentheteeth f the master-gear so as to prevent accidental displacementthereof and thus secure align.A`Ll` one of the numeral-keys, except the0 key,

through the medium of an offset extension 79 (see Figure 1) on eachactuating camdevice 55 to engage a plate or blade 80 on a rock-shaft 81mounted within thetwo actuator-frame ends 51.y /This' shaft 81 isprovided With a pair ofarms 82 secured to Said shaft and spaced in s'ucha manner as to provide' a pivotal bearing therebetween for a 5:.conuectibn 83, which performs the function of a thrust-plateprovidedwith an extension 84 engaging within an annular groove of aroller 85 pivotally secured to the face of an arm 86 of a bell-crank 87,which is pivotally mounted upon a stud 88 threaded into a plate 89extending across the front of the actuator 49 with the ends of the platesecured .to the actuator-frame ends. rlhe other arm 90 of the bell-crank87 isprovided at its upper free end with a roller 91 engaging within anannular groove 92,formed within the clutch element 71. Thus, when theshaft- .engage with a roller 94 mounted upon an arm 95 formed integralwiththe pawl 78, which is pivotally supported upon the stud 88 t0 berocked bythe extension 79 and withdraw the pawl 78 so as to release themaster-gear 52.

While an actuating cam-device 55 is being operated by the depression ofits key 26, the connection of the master-gear 52 with the drivingmechanism is maintained by means of a dwell 96 on the extension 79,which holds the rock-shaft 81 in its operative position to yconnect thedriving pinion 97 to the master-gear 52. After a number has been runinto the totalizer 53, the blade 80 leaves the dwell 96, thus enabling aspring v81b to restore the rock-shaft 81 and eifectthe restoration of-the clutch v71 to the position of Figure 17, and restore the pawl 78 toreloek the master-gear 52. This disconnection is made so as to enable anumeral-key andthe con- .nected actuating mechanism lIto rotateback tonormal position without rotating the master-gear, said gear alwaysremaining in thel position to which it is rotated during the down-strokeof the numeral-key.

The full-stroke mechanism is provided to compel a full depression ofthenumeral-keys after they have been partially depressed or.`semi-depressed, and also to compel a full restoration of thenumeral-keys on their return stroke. F or this purpose, there areprovided `locking devices including a blade or longitudinal, pawl 98secured to a rock-shaft 99 taking bearings within the two actuatorframeends 51. The blade 98is held in a central position by a spring 100operativel during the movement ofthe actuating camdevices 55 in eitherdirection with the longitudinal free edge pointed to engage withperipheral teeth 101 formed upon the edges of the camdevices 55. Eachcam-device 55 when pperated engages the blade 98, after which the teeth101vwill brush under said blade, and prevents the. return of the keyuntil the key and the connected actuating de- Vice have fully passed theeffective location of theblade 98. this manner, the blade 98 interlockswith the teeth 101 of the actuating cam-device upon both its down andreturn movements.

lt will be noted'that the studs 59* on the crank-arms 59 ofv the.differential shaft 58 depression of a numeral-key, and when said stud59a enters a slot 61 the actuating camdevice has a positive control overthe stud and prevents any possible overthrow of the rock-shaft 58 andintermediate connections to the master-gear 52. After each stud 59a hasf passed over the camming contour of the actuating devices 55, said studenters upon a `final dwell where the stud becomes inactive,

and during this inactive period the mastergear 52 becomes disconnectedfrom its driving pinion 69. The actuator mechanism up to this point issimilar to that described in my pending application, previously referredThe machine is normally set for addition where the gear-sector y engagesdirectly with the pinion 68 to drive the pinion 69 and subsequently themaster-gear 52. In order to subtract, it is merely necessary to reversethe direction of rotation of the master-gear, and rotate itsubtractively by introducing a pinion 102 betweenthe gear-sector 65 andthe pinion 68 on the shaft 72. This pinion 102 .is controlled bystate-setting mechanism, which includes a. control lever 103 outside thecasing depending from a rock-shaft 104 and taking a front bearing withinthe front plate 89 and a rear bearing at the back bar 50.

When the machine is set for addition, the control lever 103 is shiftedrightward to the position indicated by Add, and when the control leveris shifted leftward to the position ofiSub, mechanism has beenconditioned to change the direction of rotation of the master-gear 52for a subtractive transmission. The shiftin of the control lever 103 tothe left or Sub position, Figure 6, rocks the shaft 104 which isprovided with an arm 105 having a roller 106 engaging within a grooveformed in the hub of thepinion 102 to slide said pinion 102 upon a shaft107 into engagement with the pinion 68, and, during this slidingmovement of the pinion 102, the driving sector 65 is shifted out ofengagement with the pinion 68 and into engagement with the pinion 102.As previously described, the driving sector 65 is driven by the link 64connected to 'the short stud 63 between the two crank-arms '62 for aslidable movement thereon, and to control this sliding movement of thedriving sector, there is provided upon the shaft 104 adownwardly-extending arm 108 havin@l a pin 108B to engage within anannular groove 108c within the hub of the driving sector, and hence whenthe control lever 103 is shifted for a subtractive setting, said drivingsector 65 is shifted in a direction opposite to the shifting movement ofthe pinion 102, so that when said. sector releases its rotary controlover the pinion 68, the pinion 102 is shifted into engagement with saidpinion 68, and in this manner, by the simple movement of shifting thecontrol lever 103 to one of two set positions, the actuating mechanismis conditioned to transmit an additive or subtractive rotation of themaster-gear.

It is desirable at times to disconnect the computing mechanism so thatthe numeralkeys may be operated to type without registering acomputation. For this purpose, there is provided a control lever 109,similar to the control lever 103, and secured to the forward end of arock-shaft 110 (see Figure 16), which latter takes a bearing within thefront plate 89 and the back bar 50. The control lever 109 is movedbetween two positions, indicated as Off and On, and when said lever 109is shifted to the Off position, a two-armed lever 111, secured to theshaft 110, engages pins 81a and 99lil to rock their respective shafts 81and 99 to raise the blade 80 on vthe shaft 81 out of the sweep of theoffset extension 79 of the cam-devices 55, and simultaneously raise theblade 98 to an inoperative position relative to the teeth 101 on thesaid cam-devices, thus rendering these ,two blades 80 and 98ineffective, or, in `other words, disabling the full stroke device andpreventing the cam-devices from actuating the master-gear 52. With thissetting of the lever 109 to the Oil position, it will be understood thatthe depression of a numeralkey vibrates the cam-actuator devices and theseveral intermediate connections to the driving pinion 69, but withouttransmitting motion to the masterear 52, further details of which may behad rom my pending application previously referred to.

Referring to Figures 1, 5 and 6, a front rail 48 of the carriage 35 hasears 48to support arms 112 secured thereto by screws 113. The arms 112project forwardly from the carriage rail 48 and the free ends thereofare bifurcated to adjustably engage with a rail 114, which forms themain part of a totalizer-truck. 1n assembling the rail 114 to the twoarms 112, said arms become raildriving and not rail-supporting members,and it is desirable that there shall be no independent longitudinalmovement which would disturb the letter-spacing synchronism between therail and the carriage. Either may have a free up or down, or a forwardor rearward, movement, independently of each other to compensate forslight variations in parallelism between the one part carried by the.carriage and the other part secured to the frame of the machine To thisend, a slot 112a in each arm 112 (see Figure 2) receives an eccentricportion 115 of a washer 116 arranged to be clamped to the top face ofthe rail 114 by a screw 117A By turning said washer 116 about the screw117, the eccentric 115 within said slots will l take up any longitudinallooseness in the rail between the fixed arms, or the rail may beadjusted bodily to the right or to the left to time the longitudinalposition of the rail to the letter-spacing of the carriage-feedrack'forpurposes to appear.

To avoid the necessity for exact parallelism between the travel of thetotalizer-truck and the travel of the typewriter-carriage, the drivingconnection between the two arms 112 and the truck 114 is such that thefixed path of thel truck may vary slightly from the fixed path of thecarriage, without the carriage changing itstimvxg control of the truck.At Figure 2, one :zam 112 is shown as having 'ample clearance spacebetween the washer 116 and the head of a screw 117, so that the arm 112may rise or drop slightly without throwing a stress upon the rail 114,`

or the rail may rise and fall slightly Without throwing a stress uponeither arm 112.

The rail 114 along its lower longitudinal face is formed with V-shapedraceways to receive suitable anti-friction elements 118, which alsoengage with reverse VV-shaped raceways in a rail 119 forming a part ofthe back bar of the actuator-frame. In

this manner the rail 114 is supported andguided through engagement withvthe antifriction elements 118 and is movable parallel to and in unisonwiththe carriage. A roller V120 may be pivotally mounted upon a bracket121 adjustably secured to the back bar l50 midway between the positionsof thel two antifriction elements 118, and, in this manner, the rail canbe suspended and guided by the antifriction elements 118 and held inoperative relation therewith by the central roller 120 bearing upon thetop face of the rail 114. l

lAt the front face of the rail 114 a at plate 122 is permanently securedthereto, the up- -per Iand lower longitudinal edges of the plate beingbeveled to form V-guidways to suspend the totalizers 53 overtheactuator, the

totalizer having vsuitable V-ways to dovetail with the edges of saidplate, and to facilitate the adjustment of a detached totalizer to saidplate the upper right and left handv corners of said plate are cut away,as shown, S0 that the lower V-ways of the totalizer may be lfirst-hookedunder -the lower edge of said plate, and then easily adjusted tothe'u'pper V-ways of the plate.

Along the upper front `face ofthe plate 122- (see Figure 2) a toothedrack 123 is permanently secured thereto with the toothed edge parallelto and slightly below the upper edge of the plate. yThe teeth of therack have a pitch equivalent to the letter-spacing pitch of the rack 45of the typewriter-carriage, and are employed to accurately position thetotalizer in alignment with the mas-v ter-gear at any letter-spaceposition of the carriage movement'. A second toothed rack- 124 issecured lto the rear lower face '-of the vand provided with a roller 126at the free end thereof, to wipe over a cam-face 127 at the free end ofa lever 128, pivoted at 129 within the actuator-frame 49 and having aforkedformation above said pivot that includes a master dog 130 andanother member 131, that operates as a locking dog to interlock with theteeth of the rack 124 at each actuation of the rock-shaft 81 to lock thetotalizer-truck and typewriter-carriage against letter-space movementuntil the completion of the down-stroke of a numeral-key, where theblade 8() of the rock-shaft 81 snaps off the end of the offset member79, allowing said shaft to be restored by a spring .81b and the lever128 to be restored by a spring 128 against a stop-pin 132, where thelocking dog 131 releases a rack 124 to permit a letter-space movement ofthe carriage during the return movement of the numeral-key.

The totaliaers may be like those disclosed in the two patents to lVahl,previously referred to, where the totali zer-wheels are mounted betweentwo side plates 133 in which dovetails are formed to fit the beveled ordovetail edges of the plate 122. AThe totalizer may be held in positionupon the plate 122 by two pressure arms 135 spaced apart by a tierod135a (see vl4`igures 7 and 20) and carried by a shaft 136 pivoted 'inthe side plates 133 and held in contactwith the upper beveled edge ofthe plate 122 by a yspring 137, betweenl the tie-rod and a stud 138 vinone side plate 133. A release lever 139 is secured to the shaft 136 andbreaks through an open- 'ing in the top wall of the totalizer-casing 140j vtotalizer and plate 122, and, yto positively f align the totalizer toletter-space positions.

the release lever 139 is formed with a tooth terminal 142, whichenters'bctween teeth of the rack 123 to prevent lateral movement of thetotalizer.

The totalizer side plates 133 serve as suplos'A ated denominationalposition.

ports for shafts 143, 144, 145, 146 and 147, and

also support two bars 148 and 149. The shaft 143, which is stationarywith the side plates 133, supports a series of carrying gears 150rotatably mounted thereon, and each gear in the present instance isprovided with thirty gear-teeth, a locking disk 151 having three passingor clearance scallops 152, and three carry-over teeth 153. In the planeof each carrying gear 150 an idler gear 154 rotates upon the shaft 144to transmit the rotary motion of the carrying gears 150 to gears 155secured to the side face of each totalizcr-wheel 156 rotatably mountedon the shaft 145. Each carrying gear 150 is in train with a pinion 157or 157a mounted upon a stud 158 or 158a carried by an arm 159 or 159swinging about one ofthe two shafts 146 and 147.

Rigid with the pinion 157is a star-wheel 160, which is in the same planeas the locking disk 151, the clearance scallops 152 thereof permittingone step of the star-wheel 160 whenever the same shall have beenactuated by the engagement of one of the carry-overteeth 153 with thegear;150. At other times the star-wheel 160 is held against rotationthrough the engagement of the concave faces of said wheel with thecircular edge face of the locking disk 151. Rigid with the starwheel 160and the pinion 157 is a second pinion 161, which serves to transmit acarryover motion 'through the pinion 157 to the gear 150 of the nexthigher denominational order. All these elements 151,v 157 and 161 have aunitary movement upon the stud 158 and will be hereinafter referred toasa carryover unit. v

Since a totalizer of this character requires that a number be insertedor run into the totalizer-wheels at each denominational position of thetotalizer within a computing zone, it is necessary to provide means forunlocking the carry-over chain of elements at the actu- This isaccomplished by mounting each carry-over unit upon individual carryingor supporting arms 159 or 159".

Owing to the limitations of space due to the assembly of the carryinggears 15() to correspond to the usual one-tenth letter-spacing of thecarriage-feed-raclr, it is necessary to stagger the carry-over unit-s,so ythat one set of units A, mounted upon the arms 159 that swing fromthe shaft 146, shall alternate with another set of units .B mounted uponarms 159 that swing from the shaft 147, and each set of carry-overunits' is heldin operative relation with its associated' carrying gears150 by springs 162 individually connected to each arm.

Both series of arms 159 and 159'* at their upper free ends terminate atcam-members 164 arranged to individually actuate a safety bar 165 rockedupon pivots 166 at each side plate 133. This safety bar 165 extendsacross the entire width of the totalizer and is arranged to be rocked byany arm 159 or 159, and when 'so rocked by one of these arms the bar 165will swing to interlock over the ends of the other arms, to secure orlock the carryover units mounted thereon in operative mesh with theirassociated carrying gears 150 when one of the carrying units is raisedto permit the actuation of the totalizer.

The release lever 139 has a cam-face 139a (Figure 20) that will engagethe safety bar 165 on the same side as the cam-members 164 of the arms159'and 159, to rock the safety bar to the position shown in Figure 19,and thereby lock all the arms 159 and 159, whenever the totalizer isremoved from the totalizer-truck, through the action of the spring 137raising the cam-face 139a at the forward end of the lever 139. Thisprevents accidental displacement of the totalizer elements when thetotalizer is temporarily removed from the machine.

Both series of arms 159 and 159"L are formed with a slotted lowerextension 167, the slots therein being normally in alignment, so thatthe movement of the totalizer in letter-spacing will allow the freeassage of the master-dog 130, as shown in igure 20, where the lockingdog 131 is disengaged from the rack 124. When the lever 128 is vibratedto the position of Figure 19, the arm 159 is raised through the movementof the masterdog 130 to the position shown, where the associatedcarrying unit is raised from its carrying gear 150 andthe safety bar 165is shown locking the remaining arms 159 and 159 where one edge 165 ofsaid bar has swung over a stop-face 159c of each of the remaining armsto prevent displacement of their carrying units, while the one arm 159is held raised by the master-dog 130. It will be noted at Figure 19 thatthe locking dog 131 is in interlock with the teeth of the rack 124, alsothat the star-wheel 160 is raised 'to a position where a locking bar168, stationary with the tot-alizer-frame, has passed between twoadjoining notches of the star-4 wheel to prevent accidental displacementof the carrying unit during'the interval it is raised and to insureproper tooth-alignment of the pinions thereof when the arm is restoredby its spring to re-engage the unit with its carryingggear 150.I Theseries or carry-over units carried by the arm 159,l when raised,interlock with a second bar 169. each carrying arm having a clearanceslot 170 to receive said bar.

The carrying ear 150 of the lowest denominational or er has nostar-wheel interlock or carry-over unit to normally vprevent rotationthereof, and the usual arm 159 is replaced by a special arm 159b havinga single wedfring tooth 341 thereon similar to a tooth 171, `igure 19,to engage between the teeth fifi of its carrying gear 150. The arm 159bis hung upon the shaft 146, and the tooth thereon is forced intoengagement with its carrying'gear 150 by a spring 162e, and is raised bythe master-dog out of engagement with said carrying gear. Then thetotalizer is positioned at the lowest or hundredths position and whenthe carrying gear is in mesh with the master-gear, the arm 159b alsointerlocks with the safety bar 165 to lock all the other arms 159 and1591.

As the carrying gear of lowest order is actuated last in everycomputation, the sudden release of the spring-pressed wedging tooth 171of arm 159b between twoadjoining teeth of the carrying gear transmits ashock to the whole train of carrying gears, which tends to removespirality that may exist after several carry-over operations. A singletooth of this character is sometimes insufficient to jar a long seriesof totalizerwheels into' alignment, especially when the digit typed in ahundredths position is a cipher and no rotary movement is conveyed fromthe master-gear to the carrying gear 150. In such an instance thespecial arm 159a is raised and drops between the same two teeth of theundisturbed carrying gear, and no corrective effect takes place in thegears by the transmission. To further eliminate the spirality from thecarrying gear 150 a special arm 172, Figures 7 and 19, is assem-` bledupon the shaft 146, at a central position of the totalizer, as betweenthe tens and hundreds carrying gear and spring-pressed into engagementtherewith by a spring 175. This arm 172 is not actuated by the masterdog130 but the free end of the arm underlies the edge of the safety bar165, as shown at Figure 19, with a finger 17 6 secured to said bar tounderlie the end of the-arm 172. ln this instance the safety bar is notrocked by the arm 172, but the forward end oi" said arm is raised by therocking movement of the safety bar at every actuation of the arm 159 or159 Hence when carrying operations take place above the hundredsposition, the registering of each digit `causes the `arm 172 to rise anddrop, to jar the carrying gears 150 and assist in correcting thealignment of the totalizer-wheels. As shown at Figure 20, a thirdtooth-aligning arm 174 is hung upon the shaft 147 in alignment with thecarrying gear of the highest denomination, and, like the arm 172, has aninterlocking engagem ment between the safety bar 165 and the tinger 176, and the wedging tooth thereon be ing held in operative engagementbetween teeth on its carrying gear 159 by a spring 175 connected between'theiffset end 174a thereof and the shaft 136. `j 'In this manner anyspirality that may develp in the carrying gears 150 is corrected atthree different ,positions by a wedging tooth carried by the three arms159, 172 and 174 It will be` noted, at Figure 7, that both arms 172 and174 have offset ends 17 2a and 174a to position the springs 17 3 and 175where they will not interfere with the actuation of certain arms 1592*.

It is essential that the carryover units shall engage with theirassociated carrying gears 150 and disks 151 without grinding contactJfrom the tension of their springs 162, and to relieve said units fromthis abnormal pressure the bar 149 has adjusting set-screws 178 threadedtherethrough, with the ends thereof abutting the ends of the arms 159and 1592 there being one screw 178 for each arm, and each arm may beinely adjusted to maintain the proper pitch-line engagement be-v tweenthe carrying gears 150 and the associated carry-over units, regardlessof the tensions of the springs 16 To prevent the displacement of thetotalizer through the accidental depression of the release lever 141,inea-ns are provided for locking the lever, as by a member 179 pivotally hung from the under face of the top section of the totaliZer-lrameby a screw 180. This member is formed with a tongue bent U-shaped, as at181, to form a resilient flat face to wedge between a stud 182, Figure7, on the tie-rod 135at and the totalizer-frame. To actuate the member179, there is provided a finger-piece 184 that passes through a slot 185in the top face of the casing ,140.

The totalizeiunit 53, overhanging from the plate 122, would placeunnecessary strain upon the antifriction roller 120 bearing upon theupper face ot the rail 114, and to relieve said roller from this strain,each totalizer is projects rearwardly from the bracket to enu ter andengage within a channelbar 188 secured at each end by screws 189threaded inte the ends 51 of the actuator-frame 49.. The channelbar 188,as shown at Figures 5 and @comprises two parallel ledges 190 and 191with a separating space equivalent to the diameter of the roller for arunning tit, the upper ledge 190 preventing the totalizer from. beingraised, and the lower ledge 191 forining a rolling track for the roller.vThe dove- 'tail interlock between the totalizer and the plate 122 makesthe operation of assembling a totalizer more or less difficult, and, asaready described, the upper corners of said plate 122 are cut away, sothat the lower end ont the tetalizer may be first adjusted to the plate,which assists in guiding the upper end ci? the totalizer to the upperedge o1"- the plate 122, and to 'further assist the assembly of thetotalizer to the end et the truck, the end section of the upper ledge190 is removed, so that the roller 186 does not enter the channel-bar I"188 until`the totalizer has been fully assembled to both edges of thetruck.

The front support of the Wahl totalizer in riding over the roller duringthe movementof the totalizer in entering the computing zone, add to theburden of the carriage-motor. By the employment of the long channel-bar188, the roller 186 is always in engagement with the lower ledge 191,and the carriage movement is uniformly smooth throughout. Moreover, bymounting the roller 186- to the totalizer, the assembly of the bracket187 is,`

a factory gaging and assembling operation and interchangeability of thetotalizets is assured.

The upper rear. edge of the totalizer-casing 140 has denominationalletter-space graduations to guide the setting of the totalizers to a.pointer 192, indicating the printing position of the types,

It will be noted, at Figures 7 and 20, that the tongues 167a formed bythe slots in the extensions 167 vary in length and drop, and that themaster-dog 130 has a stepped ace 1309 rlhis combination of parts ailordsmeans to provide for a check to the forward. movement of the master-dog130, to prevent actuation of the master-dog at the decimal position,which position requires a space-bar operation to carry the totalizer tothe next lowerI denominational position, the masterdog 3o-operating witha bar 193, secured to the top or" the actuator, and having a transverseclearance slot to permit the passage of only one extension 107, in awell-known manner, to provide for a letter-space gap in thetotalizer-wheels to separate the' dollars from the cents.

Each numeral-key-lever 27 is formed with. a forward extension 27, toprovide for a second row of numeral-keys 26a between the lower bank ofcharacter-keys 25 and a space-bar 194;, and to provide an upper bank ofkeys tor typing numerals, and a lower bank for typing and computingnumerals, as set forth in my pending application referred to. Eachnumeral-kej-,f-lever 27 is formed with a depending tongue 195positionedto pass between two of a series of cam-elements 196u Referringto Figure 8, the manner of suspending the i cam-elements 19tl includesyoke-piece 197,

secured to the lower edge of each machine side wall 198 by screws 199 toform a bridge across the keyboard. The yoke 197 may be in the form of acasting with a recess 200 `formed by machining away the frontverticam-elements 196 may be pivotally hung in.

vertical relation to each other, the side walls ofthe channel serving asguide faces to hold the cams in uniform vertical planes. The upper endsof these cams are circular in form and have a continuous side edgecontact, as a series, between a fixed abutment 203, at the. left-handside of the yoke 197, and a righthand abutment against a plunger 204horizontally slidable through a lug 205 of the yoke, with a workingspace between the series of cams to permit the passage of the tongue.195 of a single numeral-key-lever. This working gap is made adjustableby a' setscrew 205a threaded into an adjacent lug 206 in the yoke, toabut the outer end of the plunger 204.

In prior combined typewriting and computing devices, the preventiveinterlocks for the numeral-keys are assembled within the actuator, andthe depression of a second numoral-key before a depressed key has beenfully restored will cause the parts intermediate the key-lever and theinterlocks to be sprung and subjected to an undesirable strain.Positioning the preventive means directly under the point offinger-impact at the keyboard, checks the impact before any movement canbe transmitted to the actuator.

A machine of this character is usually supplied with denominationaltabulating means operated by keys 207, positioned outside a front bar208 of the frame and provided with levers 209 ulcrumed at 210 with theirrear ends arranged to lift a stop-bar 211 into the path of acarriage-stop, not shown. lhen said keys aredepressed, as shown atFigures 8 and 9, the' levers 209 pass rearwardly between the cams 196 torest upon a universal bar 212 extending under the whole series oj levers209, with their free ends bent at right angles to form side arms 213,which are pivoted to the outer faces of the yoke 197 and hell raisedagainst the levers 209 by a spring 21a coiled about one of twopivot-screws 215. The right-hand arm 213 is formed with a bent-over ear216 to underlie the lower edge of a cam-lever 217 hung upon onepivot-screw 215, and having tongue 218 radially aligned between the headof the plunger 204 and the head of the'set-screw 205l to lill up the gapbetween the series'of cams 196. To promote a ready entrance of thetongue 218, the adjacent edges of the CTI -` Y lower case positions.

head voi. the plunger 204 and the head of the set-screw 205a may bebeveled olf, as shown. rThus when the denominational tabulating key isdepressed to release and tabulate the carriage, the universal bar 212will be swung to the position in Figure 9, and when the tongue 218 haspassed between the fixed abutment of the screw 205a and the head of theplunger 204 to close up the gap in the cams 196, the depression of anynumeral-key is prevented, as shown at Figure 12, until the tabulatingkey 207 is fully restored and the tongue 218 withdrawn from the gap asby a suitable spring 217, Similarly, if a numeralkey lever 27 isdepressed, the gap between the cams 196 will be closed, and thedepression of a tabulating key 207 will be prevented because of theinability of the tongue 218 to passbetween plunger 204 and set-screw205.

All numeral-keys 26 are inscribed with a numeral for the lower-caseposition and some non-numeral characters for the upper caseA shift, likethe sign for dollars on ythe 4 key, and the sign for number (ai) on the3 key. It is necessary many times to print the sign for dollars within acomputing zone, and case-shifting the platen or segment, wouldordinarily run the numeral 4 into the totalizer, and provision hasheretofore been made to employ a disconnect key to sever the connectionbetween certain parts of the actuator mechanism to silence themaster-gear, and after the typing of the $-character the disconnect keymust be restored, twd operations that are liable to result in error orconfusion.

For the purpose of the present invention, a standard shift-key 219 iscarried by a keylever 220 pivoted to the rod 28 and formed with acrank-arm 221 engaging a frame 222 that swings with a rock-shaft 223pivoted in the frame-ends.l This frame 222 carries a rail 224 upon whicha center roll 225 of the platen-frame rides in both upper and The frame222 carries a stud 226 against which a lever 227 is springpressed tovibrateabout a pivot 228 and follow the up-and-down movement or" thestud D"26 during a case-shift movement of the plateno has a stud 229 toengage within'a slot 230, formed in the rear end of a lever 231 pivotedat 232 to the outer ace of the right-hand actuator end 51. The forwardfree end of the lever 231 is bifurcated to form a fork having two prongs233 and 234 positioned to underlie crank-arms 235 and 236 carried thetwo rock-shafts 99 and 81, respectively. lflhen the shift-key 219 isdepressed, as at Figure 13, the platen is shifted to the upper@ easeposition, and the intermediate levers 227 and 231 actuate the two prongs233 and 234 to raise the two crank-arms 235 and 236, t0; reak the shafts99 and 81, and their associ- The forward end, of the lever 227 atedblades 98 and 80 are vibrated, one out of the path of the teeth101 ofthe cam-de-` vices 55, and the other out of the path of the dwell 96,with the result that, during the upper case-shift movement ofthe platen,the full-stroke device for the numeral-keys is rendered inoperative, andthe connection between the master-gear and the pinion 69 is void, andthe depression of the 4 numeralkey to type the sign for dollars does notactuate the master-gear, and immediately after the release of theshift-key, the rock-shafts 99 and 81 are restored by their springs 81band 100 to normal positions.

'lo prevent the actuation. of a numeral-key 26 during the depression ofthe shift-key 219` or to prevent the depression of the shift-key duringthe actuation of the numeral-key to type or compute, 'eachnumeralkey-lever 27 has a lug 237 at the u-nder edge, to engage with auniversal bar 238 formed with turned-over ends 239, and is secured to arock-shaft -240 having a bearing in the The shaft 240 has a crank-arm:trame sides. 241 provided with a spring 241aL that holds the universalbar 238 against the lower faces of the lugs 237 under tension. An arm242 secured to the shaft 240- formed with a turned-over end 243 vibrateswith the shaft to clear a turned-over end 244 of an arm 245 secured to arock-shaft 246. The shaft 246 may be rocked by a stud 247 on the shift.key-lever 220 to engage a cam-arm 248 fixed to the shaft 246. Tomaintain the arm 248 against the stud 247 in all positions of thekey-lever 220, a lever 249 mounted for a free movement upon the shaft240 is provided with a spring 250 to raise the forward end thereof toabut a short arm 251 forming a part of the cam-arm 248., The depressionof the numeral-key vibrates the universal bar 238 to rock the shaft 240to vibrate the arm 242 that just clears the turned-over end 244, asshown at Figure 13, and should the shift-key 219 be depressed during theprior depression of a numeral-key, the rocking of the shaft 246 will bechecked through the blocking of the arm 245 by the turned-over end 243,also shown in this ligure. The depression of the shift-key 219 initiallyvi- ,lever 253 secured to a rock-shaft 254 that carries a centercrank-arm 255 lifted by a spring 256 and having a connection 257 to theWell-known back-spacing device 258 that operates to back-space thecarriage inthe '33.' a stud 259 atthe side thereof to normally clear anarm 260 fixed to the shaft 240. `ifi/*hen the back-spacing key is,depressed, as at Figure 14, the stud 259 is swung downwardly to aposition to intercept a swinging movement of the arm 260'and therock-shaft 240, to prevent actuation of the universal bar 238 by anumeral-key 26, or with the arm 260 positioned, as at Figure 18, by adepressed numeral-key the rocking'of the shaft 240 by the universal bar238 swings the arm 260 under the stud 259 to prevent an actuation of theback-spacing key, and the end 243 of the arm 242 is swung to intercept aswinging movement of the arm 245, and thus prevent the depression ot theshiftkey 219.

It is desirable that, while the actuator parts are partially operated,as shown at Figure 4, to condition certain-parts to be restored byraising the blade 98 out of engagement with the cam-devices 55, theseveral parts connected thereto will be restored to normal, including anegative rotzation of the master-gear that is in operative train with atotalizer-wheel. To this end, there is pivoted on the inside face of oneactuator- `frame end 51 a lever 262 havin a'bent-over lip 263 positionedto engage with the blade 98 to be normally held in inoperative. positionagainst a stop-pin 264 by a spring 265. rlhe lever 262 is secured to theinner end ot' a stud 266 that takes a bearing in the end 51 with theouter end thereof suitably secured to a lever 267, said levers 267 and262 having a unitary movement and being arrested in one position by thepin 264, and Iat the down position of the lever 267 by a pin 268. Whenthe lever 267 is depressed by fingerpiece or error-key 269 from theposition of Figure 1 to that of Figure 4, the blade 98 is forced out ot'engagement with the peripheral teeth ot the cam-elements 55, and thelspring restores the associated parts to normal positions withoutentering the partial computation.

lt may happen that the partially-depressed key has effected a carryingmovement to one or more higher denominational totalizerwheels, and whenthe parts are to be restored back to normal and it is necessary toetlect reversal the carrying elements, the spring 66 may be deficient toeffect this extra movement, as it is desirable that the spring-tensionshall not overbiuden` the numeral-keys. It will be remembered that theuniversal bar 238 is actuated by all 'the numeral-keys, and said bar isrestored by the spring 241 and supplements the spring 60 in restoringthe typing and computing members. To increase the power `for restoring'these several parts during the interval the lever 267 is depressed,

a supplemental spring 261 may be connected between the universal b ar288 and an arm 267 of the lever 267. The tension of the spring 261 atthe normal position shown in dotted lines, Figure 4, is practicallywithout tension, so as not to increase the normal resistance of theuniversal bar 238, but. when the lever 267 is depressed to erase theset-up state ofthe computing parts, the arm 267a is shifted from thedotted-line position to the full-line position, Figure 4, which placesthe spring 261 under a higher tension to restore the actuator parts.Should this spring-tension at any time prove to be 'defective inrestoring a semi-depressed key and its associated parts, it will benoted that through the positive transmission between the cam-devices 55and the roller-actuated dii'erenti al shaft, any semi-depressednumeral-key may be restored manually by a linger-lifting movement of thekey while the lever 267 is held depressed.

The combined machine so far described provides-for a typing or for acombined typing and computing operation. In some classes of work it isdesirable to enter sub-totals into the totalizer without typing theitems, to provide a grand total which will be typed in a vsingle line,as for a daily statement. In all standard typewriters the transmissionof the key-lever to the type-bars is so arranged that the type-bardepends upon its own inertia to actually reach the platen to type, andhence there is a short interval just before the typeimpact when the keyhas completed its full down-stroke, and if a thin obstruction is placedin front of the platen to arrest the type-bar just in advance of thetype-impact, the arresting of the type-bar will not inter- 'ere with thecarriage-feed movement, nor with the computing mechanism.

To this end, there is shown, at Figures 1 and 11, an arm 270 which mayhe swung from an inoperative position at the side of a segment 41a tothe dotted-line position of Figure 11, to intercept each type-bar. Thearm 270 may be made of thin metal and formed with an ear 272 at rightangles thereto, which is pivotally secured to a bracket 273 by a screw274, said bracket being secured to the face of the segment 41a. The arm270 may be swung between the two positions of Figure 11 by a. link 275connecting the ear 272 with a crankarm 276, ulcrumed upon the segment 41and formed with an arm 277 connected by a link 278 to the upper end of abell-crank 279 hung upon a screw 286 threaded into the rear end of albracket 281 secured to the frame by screws 282. The bell-crank 279 has ashort arm 283 connected with a link 284 to an ear 285 upon the upperedge of a key-lever 286 formed with a bifurcated end 286*1 fulcrumedupon a bell-crank Julcrum Wire 30, and rovided with a non-print key 287at the 'eyboard. It will be noted that (Figure l) the ear 285 of thelever 286 has a spring 288 con-

